[PATCH] media: platform: xilinx: xilinx-tpg: constify v4l2_subdev_* structures

[Bhumika Goyal]

v4l2_subdev_{core/pad/video}_ops structures are stored in the
fields of the v4l2_subdev_ops structure which are of type const. 
Also, v4l2_subdev_ops structure is passed to a function
having its argument of type const. As these structures are never
modified, so declare them as const.
Done using Coccinelle: (One of the scripts used)

@r1 disable optional_qualifier @
identifier i;
position p;
@@
static struct v4l2_subdev_video_ops i@p = {...};

@ok1@
identifier r1.i;
position p;
struct v4l2_subdev_ops obj;
@@
obj.video=&i@p;

@bad@
position p!={r1.p,ok1.p};
identifier r1.i;
@@
i@p

@depends on !bad disable optional_qualifier@
identifier r1.i;
@@
+const
struct v4l2_subdev_video_ops i; 

File size before:
   text    data     bss     dec     hex filename
   6170    2752     144    9066    236a media/platform/xilinx/xilinx-tpg.o

File size after:
   text    data     bss     dec     hex filename
   6666    2384       8    9058    2362 media/platform/xilinx/xilinx-tpg.o

Signed-off-by: Bhumika Goyal <bhumi...@gmail.com>
---
 drivers/media/platform/xilinx/xilinx-tpg.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/media/platform/xilinx/xilinx-tpg.c 
b/drivers/media/platform/xilinx/xilinx-tpg.c
index 2ec1f6c..9c49d1d 100644
--- a/drivers/media/platform/xilinx/xilinx-tpg.c
+++ b/drivers/media/platform/xilinx/xilinx-tpg.c
@@ -460,21 +460,21 @@ static int xtpg_s_ctrl(struct v4l2_ctrl *ctrl)
        .s_ctrl = xtpg_s_ctrl,
 };
 
-static struct v4l2_subdev_core_ops xtpg_core_ops = {
+static const struct v4l2_subdev_core_ops xtpg_core_ops = {
 };
 
-static struct v4l2_subdev_video_ops xtpg_video_ops = {
+static const struct v4l2_subdev_video_ops xtpg_video_ops = {
        .s_stream = xtpg_s_stream,
 };
 
-static struct v4l2_subdev_pad_ops xtpg_pad_ops = {
+static const struct v4l2_subdev_pad_ops xtpg_pad_ops = {
        .enum_mbus_code         = xvip_enum_mbus_code,
        .enum_frame_size        = xtpg_enum_frame_size,
        .get_fmt                = xtpg_get_format,
        .set_fmt                = xtpg_set_format,
 };
 
-static struct v4l2_subdev_ops xtpg_ops = {
+static const struct v4l2_subdev_ops xtpg_ops = {
        .core   = &xtpg_core_ops,
        .video  = &xtpg_video_ops,
        .pad    = &xtpg_pad_ops,
-- 
1.9.1